2020 Prime 135k- what to maintain?

you missed the major at 120k?

 

i would just follow the maintenance schedule, and consider a tranny fluid change

 

Yep, ATF change, litmus test coolant and moisture test brake fluid - just to be safe. On a highway runner, it'll probably be fine. Going up and over the Altamont pass every day will breakdown the ATF. The ATF change should be around $125, and the other two test should be free or $5 bucks each, at a good honest shop.
Your brakes should be fine; but I'd look at the pad wear. With my driving style, I'm usually at around 50% at this point. If no-one has been topping off your brake fluid; you can usually use that as a gauge for where your pads are at, without pulling the tires.

 

If it were my car I'd change out the transmission fluid and coolant (radiator and transaxle...takes the same stuff). I recommend not ever topping off brake fluid...it's a great indicator of brake pad wear...it it's low, you need new pads somewhere!

 

You can get a maintenance schedule at Toyota.com/owners

 

Be sure to pop out the battery fan filters and give them a blast with the air compressor... quick and free

 

Brake inspection. There’s more to it than just waiting till pads are down to 1 mm. Toyota recommends tri-yearly or 30k miles for this.

As @bisco alluded to: spark plug change is overdue, 120k or 12 years.

preemptive water pump (and thermostat) change?

 

Reading this it seems like the OP is trying to procrastinate

To me it seems like you are trying to avoid maintenance - if I read this correct you are pushing out oil change intervals to 15K and delaying on or skipping altogether all other recommended maintenance.

I'd recommend you change your approach and do maintenance as recommended before it is too late. If you want to save money, just learn to do it yourself. Having proof you have done so will increase the value of your car on the used market, and also likely make it last longer, saving money in the long run.

Of course you could skip out and delay on maintenance and your car wont have problems, until it does. You are still in the honeymoon phase but all of this delaying could catch up to you.

If it were me I'd only delay maintenance if I was in a financial emergency and literally had to take out credit card debt to get it done. And if you are in that kind of financial emergency you shouldn't be owning a nice car like this relatively new Prius - you should sell it and buy a 2000 Toyota Corolla and clean up your debt with the money you make from the car. But as others have said - it is your car, you can do as you please with it.

If this sounds snarky and rude blame Dave Ramsey - I've been listening to too many of his rants about financial responsibility.

 

You may be right; IIRC you might just need to loosen the window trim and shift it a bit. With 3rd gen the window plastic trim, the wipers and their motor/linkage, and metal cowl and it's brace, all needs to come off. Lots of bolts, clips, conduit snaps, and on and on.